39689321 has 4 divisors (see below), whose sum is σ = 45359232. Its totient is φ = 34019412.

The previous prime is 39689303. The next prime is 39689369. The reversal of 39689321 is 12398693.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39689321 - 2⁶ = 39689257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39689381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2834945 + ... + 2834958.

It is an arithmetic number, because the mean of its divisors is an integer number (11339808).

Almost surely, 2^39689321 is an apocalyptic number.

It is an amenable number.

39689321 is a deficient number, since it is larger than the sum of its proper divisors (5669911).

39689321 is an equidigital number, since it uses as much as digits as its factorization.

39689321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5669910.

The product of its digits is 69984, while the sum is 41.

The square root of 39689321 is about 6299.9461108806. The cubic root of 39689321 is about 341.1074643452.

The spelling of 39689321 in words is "thirty-nine million, six hundred eighty-nine thousand, three hundred twenty-one".